Antony Syengo
Full-Stack Software Developer
Web Applications · Business & POS Systems · Data-Driven Solutions
Professional Summary
Full-Stack Software Developer with a Bachelor of Science in Data Science and Analytics from Jomo Kenyatta University of Agriculture and Technology (JKUAT). Experienced in designing, building, and deploying responsive web applications and multi-tenant business software using Next.js, React, TypeScript, Node.js, and PostgreSQL/Supabase. Proven track record of delivering e-commerce platforms, Point-of-Sale (POS) systems, M-Pesa Daraja payment integrations, and NGO web portals, complemented by enterprise IT support experience at The National Treasury.
Technical Skills
Professional Experience
Full-Stack Software Developer (Freelance & Independent Systems)
Nairobi, Kenya | 2025 – Present- Design, build, and deploy full-stack web applications and vertical business systems for retail, hospitality, and nonprofit clients using Next.js, React, TypeScript, Node.js, and Supabase/PostgreSQL.
- Deliver end-to-end e-commerce and Point-of-Sale (POS) workflows featuring real-time inventory synchronization, role-based admin dashboards, and automated M-Pesa Daraja API mobile payments.
- Developed and launched the official web platform for Maasai Action Aid Initiative (maactionaid.org), implementing responsive accessibility, technical SEO, and donor inquiry workflows.
IT Support / Technician Attachee (Industrial Attachment)
The National Treasury — Nairobi CBD, Kenya | 2024- Provided first-line technical support to ministry staff across departments, diagnosing and resolving hardware, operating system, and office software issues.
- Configured, updated, and maintained desktop workstations, peripheral devices, and printers while assisting with local area network (LAN) connectivity troubleshooting.
- Supported routine preventive hardware maintenance, system updates, and secure workstation configuration in line with public-sector ICT procedures.
- Documented support tasks and escalated complex network or enterprise infrastructure incidents to senior ICT officers for timely resolution.
Digital & Graphic Design Volunteer
Tuwakuze Africa | 2022- Designed digital communication and promotional graphics using Adobe Illustrator to support community outreach campaigns and organizational events.
Selected Software Engineering Projects
Kilimani HairOS
— Retail E-Commerce, Inventory & POS PlatformArchitected a unified retail management and e-commerce platform for a wig retailer, combining online storefront ordering, in-store POS checkout, and inventory control.
- Integrated M-Pesa Daraja API (STK Push) for automated mobile money checkout and payment reconciliation.
- Engineered shared inventory state using Supabase (PostgreSQL) and Zustand to prevent overselling across online and walk-in sales channels.
Tech Stack: Next.js · TypeScript · Supabase (PostgreSQL) · M-Pesa Daraja API · Zustand · Tailwind CSS
Op Fits
— Vertical SaaS & Omnichannel Fashion CommerceBuilt an omnichannel fashion-commerce platform connecting online storefront purchases with in-store POS operations and centralized inventory management.
- Designed relational database schemas in PostgreSQL/Supabase for multi-variant apparel catalogs (sizes, drops, and stock levels).
- Implemented M-Pesa Daraja API checkout flows alongside administrative order and dispatch workflows.
Tech Stack: Next.js · TypeScript · Supabase (PostgreSQL) · M-Pesa Daraja API · Tailwind CSS
Crack OS
— Quick-Service Restaurant (QSR) POS & Order SystemDeveloped a quick-service restaurant (QSR) operations system linking digital customer ordering, counter POS checkout, and kitchen fulfillment workflows.
- Structured multi-branch menu, order queue, and inventory data models in Supabase/PostgreSQL.
- Integrated M-Pesa Daraja API payment prompts and real-time order status transitions from checkout to kitchen prep.
Tech Stack: Next.js · TypeScript · Supabase (PostgreSQL) · M-Pesa Daraja API · Tailwind CSS
Maasai Action Aid Initiative
— Official NGO Web Platform & Community PortalDesigned and deployed the official responsive web platform for a nonprofit organization to showcase community programs, publish news, and capture donor inquiries.
- Engineered semantic, accessible pages with Next.js and TypeScript, optimizing Core Web Vitals and search engine visibility (SEO).
- Integrated Formspree-backed communication workflows for donor outreach, volunteer sign-ups, and stakeholder inquiries.
Tech Stack: Next.js · TypeScript · Tailwind CSS · Formspree · SEO Optimization
AmpTech Power Solutions
— Electrical Hardware Catalog & Consultant CheckoutBuilt a full-stack product catalog and consultant-checkout application for a renewable energy and electrical hardware supplier using Node.js, Express, and MongoDB.
- Developed a RESTful backend with Node.js, Express.js, and MongoDB (Mongoose) featuring JWT-authenticated administrative routes.
- Integrated Cloudinary for automated product image uploads, optimization, and catalog media management.
Tech Stack: Node.js · Express.js · MongoDB · JWT Auth · Cloudinary · JavaScript
Education
Bachelor of Science in Data Science and Analytics
Jomo Kenyatta University of Agriculture and Technology (JKUAT)
Coursework & Applied Focus: Statistical Modeling, Machine Learning, Database Systems, Data Visualization, Python Programming, and Computer Vision.